Article 523. Unilateral refusal to execute a supply contract.
1. A unilateral refusal to execute a supply contract (in whole or in part) or its unilateral change is allowed in the event of a material breach of a contract by one of the parties (paragraph four of clause 2 of article 450). 2. Violation of the supply contract by the supplier is presumed significant in the following cases: the supply of goods of inadequate quality with deficiencies that cannot be repaired in time acceptable to the buyer; repeated violation of the terms of delivery of goods. 3. Violation of the supply contract by the buyer is assumed to be material in the following cases: repeated violation of the terms of payment for goods; repeated non-selection of goods. 4. The supply contract is considered modified or terminated from the moment when one party received the notice of the other party about the unilateral refusal to perform the contract in whole or in part, unless a different period for termination or amendment of the contract is not provided in the notice or is not determined by agreement of the parties.
References to other articles of chapter 30. Purchase and sale: